Well, that's the site upgraded from BlogEngine.Net 1.5 to 1.6. Could probably have gone a little smoother, mainly as a consequence of the new integration of Akismet conflicting with the old Commenter plugin. Still, in spite of sparse documentation, all seems to be okay now.
UPDATE 18:40 Well, according to my ftp client, I'd delete the Extension Manager folder, but obviously not. Logged in to the server and deleted it (again) and this time, fingers cross, things look better.
Tags: bloengine, 1.5, 1.6, upgrade